FAMILIES A]S"D GENERA OF THE MADEEPOEARTA. 



167 



Distribution. — Fossil. Oolitic : England. Cretaceous : Europe, 

 India. 



Subgenus TEOCHAEiEA, (genus) Etallon^ Lethcea Bruntrutana 

 (Zurich, 1864), p. 411. 



Corallum simple, largely fixed, having the structure of Micro- 

 solena. It approaches the genus Anabacia, but has more di- 

 stinct (latticework-like) septa and is broadly adherent. No 

 epitheca. 



The species described and delineated by Etallon (op. cit. p. 411, 

 pi. Iviii. fig. 4) is TrocharcBa actiniformis. A small short coral- 

 lite, cylindrical, and hemispherical above, largely fixed, the base 

 being broader than the calice. Calicinal central fossette narrow 

 and deep. Septa latticework-like, stout, in five cycles, the last 

 being more or less incomplete. Columella indistinct. Height 

 7 milhm. 



Distribution. — Fossil. Jurassic : Europe. 



I give the diagnosis of Haplarcea, but do not place the genus. 



Genus Haplae^a, llilascJieioitscJi, JSfattlieim. Korallen, 

 Abtheil. ii., PalceontograpMca, xxi. p. 228 (1875). 



Corallum simple, cylindrical, tall, deeply indented with broad 

 circular growth-rings, and furnished with a smooth epitheca 

 (here and there). The calice is shallow and elliptical. There is 

 no columella. The septa are very numerous, well developed, and 

 perforated by large apertures distributed without order. The 

 younger septa unite with the others, and all are united by 

 numerous well-developed synapticula. 



Distribution. — Fossil. Jurassic : Europe. 



Group-Gemis Cyclolites, Lamk. 



Genus Cyclolites, Lamarclc^ Syst. des Anim. sans verteb. p. 369 

 (1801) ; Milne-Edwards ^ Jules Ilaime, Hist. Nat. des 

 Corall. vol. iii. p, 37 (1860) ; F. Fratz, PalwontograpJiica, 

 xxix. 1882, p. 7, Taf. xiv. figs. 1-8 ; amended. 



The corallum is simple, free, circular, elliptical, or slightly 

 angular in outline, flat or slightly concave at the base, where 

 there is a well-developed concentrically folded epitheca, convex 

 more or less above. Eossula circular or elongate. Columella 



